I am SO proud of my step-Son having passed his exams! I decide to make him a little cake to congratulate him on his good grades.. but somewhere during the mixing process I accidentally flashed him my cleavage and well.. lets just say it made something pop up that I don't think either of us was expecting. At first I was embarrassed for him.. but then quickly I become flustered and HOT.. unable to take my eyes off of his unusually sized penis pressing against the fabric of his sweat pants. I had NO IDEA my step-Son was so well endowed.. so thick.. so.. fucking.. HUGE. I couldn't help myself but want it inside of me.. to feel that fat dick stretching out my pussy.. I wanted my step-Son to take advantage of me.. to use my body for his pleasure.. and I didn't even care that I was his step-Mother.